The latest Star Wars Theory about Rey's parents states that when Rey was a child, Rey accidentally killed her parents as they were leaving Jakku. The alleged event is seen in Rey's Forceback vision during The Force Awakens.

This theory about Rey's parents goes on to say that Kylo Ren is aware that Rey killed her parents, and it is why Rey is able to connect with Kylo Ren during the Reylo scenes because she knows that she also killed both her parents, even though she has repressed the memory.